Valved thermal device.



W..H. MGNUTT.

VALVED THERMALDEVIGE,

APPLICATION FILED MM5, 1911.

IN VEN T 0R qui maw um?,

l A slimline, m Mw where llmllm lampei Samia@ wi l? Mlm #e to :l1 lim mlm?, las. :normally Embed and lglm buildin promptly z im l1-lm mm mul L si ,www l am hmm l mat @kalief piping 1M; 'tlm .lira pmgmsss@ this aww tm mly oii im bmnmles wry hol; anal clva--f miembex", 'Wh-lull is intmlefl upm tended for use with relatively lovvpressures;

with pressures of a few inches o-Water for example.

In the presentinvention the mentioned disadvantages heretofore inherent in devices of this kind are entirely obviated. in the present device means yare provided whereby communication between thesupply main and the local piping is eliectually ont on .when the temperaturev in the vicinity of the device rises above a certain predetermined limit, While further means, operative only afterl communication with the supply main has been cut oi, allows the gas trapped in the meter and local piping to pass oi'f quietly. It the device be' caused to operate by the heatv of a naked flame in proximity thereto, the gas thus vented is ignited and burns quietly, thus being consumed by the same agency which causes the cut-oli to opcrate, and beingthereby rendered harmless.

Whether the local piping remains intact or not, there is thus no danger, where the present invention is employed, of the meter or piping bursting.v

'While I have referred. for purposes ci illustration to the use of my new device in combination With a gas distributing system, it may of' course be employed other and generally similar systems where miiammable fluids are handled. For example, it

may be advantageously inserted between a v gasolene supply tank and a carbureter or 'automobiles or motorboats.

i In the accompanying drawings l. have shown more or less diagrammatically certain embodiments ofthe present invention. In this showing: Figure l is a longitudi; nal cross section of one t'orin or cut-oli member; Fig. 2 is an end vieiv of avalve plug; Fig. 3 is a section on the line lll-dll of Fig.v 1, certain parts being removed; Fig. 4 is a longitudinal section of another form of cut-oil' member; Fig. 5 is a section ori-the line'V-V of Fig. fl; Fig. 6 is an end vievv of a modiiied valve plug; Fig. 7 is a detail; Fig. 8-shows the cut-oli device applied to a gas meter; and-Fig. 9 shows another container provided with the device.

Referring to the drawings, l is a fitting' or valve casing having a VHuid.conducting passage Q extending therethrough, and suit.

ably connected as at 3 and l to piping. tending transversely oi the passage is valve chamber 5, closed atits cuter end by screw capo. The opposite end of the valve charnbei` isshaped to form a seat 7 for valve plug 8. Referring now more particularly to Fig. l, the valve plug is provided withv` vent channel 9 which may extend inwardly from the side ofthe plug and then axially thereof tothe smaller end, and which opens into hollow stem 10 which in turn extends"'"- through end wall 11 of the valve chamber with a sliding fit and terminates in hemi- 4low stem l0.

Licencia spherical valve i2 normally seating on the edge of circular opening 13. This valve prevents fluid from passage (2) entering chambei il which is closed by screiv cap 15 hav ing vent opening i6 in alinement with hol- Located Within this second chamber betvveen and sealing the end of the hollow stern and the vent (16) is a plug or block i7 of fusible material such as Wax. paraiin, low fusing meta-l, such as various alloys of cadmium, bismuth, tin, lead'et-c, or the like, serving at ordinary temperatures to hold the valve on its seatand the lvalve plug (8)' away irorn its" seat against the pressure of compressed spring 18 which mayy sprir-Cr actuated plunger ,valve which immeclialtelv moves forvvardfto close theiiuid passage (2). At the same'timethe.ball valve (lf2) leaves its seat and, together with the hollow stem, is pushedl forward into Contact with the vent (16), the vent and end of the hollenT stem being in alinenient. The passage (2) is thus completely closed on one side of the valve; vvhile `onl the other side, which is next the meter, there is communication between the passage and outside of .the device, through the L-shaped vent channel, the hollow stem and the vent in the SorenT cap.` Any gas in the meter and local pipe system, which upon heating would otherwise develop bursting pressure, isI thus allowed to esca-pe quietly, .while flow of. gasl from the supply main is effectively cut oil.

ln Fig. 4C is shown a. modification of thel fit the inner end olf the member (-22) is.l

secured by brazing orwelding a disk 25' oi" brass or other suitable metal having apex`- turesldtherethrough engaging 'the ends of -the gnidesbefore mentioned and having vent oriii'ces 2T.' Lying'. against this disk is e ond disk- ',Zgof a fusible material such sealing ivan or some 'similar substance `which s not a'ectedv bythe duid with which it iste come in conta-ct. and which prevents entrance of fluidrom the vaivechamb'er into lend of the plunger velve crmlnber.

meente "plug, together with the eenling; wat; dielr normally belde tbe plunger valve entity from ite seat against the pressure el he ectuating Spring. Ae will be noticed, in this modification, the val-ve structure (l2) shown in litiga l is doneeway with; While in its place iS the sealing Wax disk which eilectually scale the guides attached to the volte plug' and engaging the orifices in the brass dielr prevent the valve from being accidentally tlnnecl about its eine. The length of tbe guidera should be euch that-When tbe plunger 'valve ie released the ends of the guides (lo not quite touch the cap (23). A ,small clearance eprice 30 pre vente the vent or'ices in the brass disk beingi closed when the plunger 'valve ecrite.

When the valve device becomes heated fusible plug," and sealing Weir diaphragm melt and permit the spring to force 'the valve against ite seat, cntirelycloeing pas sage (2). The vent openings no the screw' cop of course permit the materiel ci the fused plug to pase out of the cut-ott device, und communication between the lower port of conduit 2 and the outer air is thus established by way of groove (20), orcee (27) and vents (24C). it the same time the open-l ing into the'upper. portion :of conduit 2 le closed.. ln this ty e et valve there is also communication, W en the relire ie seated, between the portion of tbe votre chamber 'adjacent to the spring-'and `the outer air,

which prevents the poehetintg of in that portion et tbc valve chamber. The sealing Wax disk while melting at approximately' the saine temperature as the fusible plug, preventie the' letter from being dissolved Where gj'asolene 0r similar liquide are passed through, the device. Sealing wur; is preetie cally insoluble in euch liquids. ue type et sealing wax ie a calcium resinate, a body insoluble in hydrocarbons, euch gasolene.

f As before stated, thenew cut-oil may be used in various combinations. lflor erample, in Fig. 8 it is shown set between o, meter 3,1 and service pipe 32 leading to e street main not shown. Pipe 33 leads to seine local piping system, for example the Piping' in a building. ln Fig. 9 the cut-oil 1e shown between a rnotor boat' or automobile geselene Supply tenir and.' pipe b lending to a carbureter. The tenir may provided as shown with renting ineens 36 to which is beet attached a safety tube 37 et motel ,gauze or screen., When necessary or deeireble tbe rent et tbe valve device itself moy also be protected with o. safety tube attachment or other protecting means eoumrieing metal 'auzc to prevent bach'u dro.' ting et deine into the meter. or other. container'.

lli/ly new automatic emboli' device may' also'V .tank or other liquid container, with the val-ve vent turned eo es to eommuniczite with the container. A. discharge pipe may connect with the 'Valve vent end may leed to Sonic suitable container located. at it-point more or lese remote from the gueolene tenir. ln the event of tire occurring neer the tenir, the cut-oil device would then e crate to per .mit automatic discharge of t e tank contente into the container eta, sai'e distance' 'from the tire Ll; A tluid controllingdevice, comprising a fluid conduit, e votre chamber disposed enbetontially trenerereely thereof end haring e valve seat, e vulve nieinber in said chamber yodaptrni to close said. conduit by engaging the 'telve seat, :Fusible means normally holding seid Valve member away from .ea-irl Seat, Incane in Seid valve member" lim' vent/:rig e limited portion. of seid con Sti (init when said 'valve member is seated, and

`for renting e limited portion of saiol conduit when Said valve member is eeated, end e dielr olf materiel eubstantially insoluble in l'lydrocerbone Separating said 'fusible means frein said valve cheinber.A

ln teetiinony whereof, l aflix my signature in the presence el Witnesses. l

ll'lQLlllllM H. lll'elilU'lT. Witnesses;

Jno. .ll/londen, Louie Lnerirr.

substantially transversely thereof and hei 

